Gentry has made huge strides in the cross ties. After the third time in them he finally stopped attempting to paw at all and just stood quiet from the moment I put him in the grooming stall. I've been putting him in there after he eats his grain at lunch time, while Hugo finishes his up (he has a lot to eat). This gives me a chance to groom Gentry, even if he doesn't need it, and for him to get conditioned to the grooming stall. It also negates me having to play grain referee while we wait for Hugo to finish up. At this point I feel completely comfortable with him in the cross ties, and my farrier even trimmed him in the ties the other week. Such a good boy!
He's so chill I can even leave the throat latch open on the halter for grooming.